Question

当应用处于前台或后台时，我收到来自fcm的通知。我不想显示通知当特定活动中的应用如何在应用处于特定活动时禁用通知时。

我使用datapaylod进行通知

Answer 1

所以你想知道目前哪个（如果有的话）活动在前台。并且根据类类型，希望限制通知的显示。

您需要自己维护。最简单的方法是编写一个新类并在其中包含公共静态函数，以将活动标记为活动/非活动

public static Activity mCurrentActivity = null;

public static void SetActivity(Activtiy activity) { mCurrentActivity = activity };

public static void ClearActivity(Activtiy activity) 
{ 
    if (mCurrentActivity.equals(activity))
         mCurrentActivity = null;
}

public static Activity GetCurrentActivity() { return mCurrentActivity; }

一旦你有了这样的infra，你可以分别在所有的onResume和onPause覆盖中调用SetActivity和ClearActivity函数。

最后，在通知构建器类中，您将获得当前活动的实例并比较.class以检查您所需的活动是否是焦点。如果Current活动返回null，则表示您的应用程序不在前台。

有更好，更有效和更清洁的方法来做到这一点。例如。使用Daggr进行依赖注入。

Answer 2

您可以通过以下方式检查当前的热门活动：

public static Activity getActivity() {
Class activityThreadClass = Class.forName("android.app.ActivityThread");
Object activityThread = activityThreadClass.getMethod("currentActivityThread").invoke(null);
Field activitiesField = activityThreadClass.getDeclaredField("mActivities");
activitiesField.setAccessible(true);

Map<Object, Object> activities = (Map<Object, Object>) activitiesField.get(activityThread);
if (activities == null)
    return null;

for (Object activityRecord : activities.values()) {
    Class activityRecordClass = activityRecord.getClass();
    Field pausedField = activityRecordClass.getDeclaredField("paused");
    pausedField.setAccessible(true);
    if (!pausedField.getBoolean(activityRecord)) {
        Field activityField = activityRecordClass.getDeclaredField("activity");
        activityField.setAccessible(true);
        Activity activity = (Activity) activityField.get(activityRecord);
        return activity;
    }
}

return null;
}

您可以检查热门活动是否是您不想显示通知的活动，然后从服务中返回该呼叫。

Answer 3

试试这个，

  private void sendNotification(String msg) {
    Intent notificationIntent = null;
    notificationIntent = new Intent(currentactivity.this, Main2Activity.class);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);


    PendingIntent contentIntent = PendingIntent.getActivity(GCMNotificationIntentService.this, 0, notificationIntent, PendingIntent.FLAG_CANCEL_CURRENT);

    NotificationManager nm = (NotificationManager) GCMNotificationIntentService.this.getSystemService(Context.NOTIFICATION_SERVICE);

    Resources res = GCMNotificationIntentService.this.getResources();
    NotificationCompat.Builder builder = new NotificationCompat.Builder(GCMNotificationIntentService.this);
    builder.setContentIntent(contentIntent)
            .setSmallIcon(R.drawable.app_logo_small_trans)
            .setColor(getResources().getColor(R.color.app_logo_color))
            .setLargeIcon(BitmapFactory.decodeResource(res, R.drawable.app_logo))
            .setTicker(msg)
            .setWhen(System.currentTimeMillis())
            .setAutoCancel(true)
            .setContentTitle("Propreka")
            .setLights(0xffff0000, 100, 2000)
            .setPriority(Notification.DEFAULT_SOUND)
            .setContentText(msg);

    Notification n = builder.getNotification();

    n.defaults |= Notification.DEFAULT_ALL;
    nm.notify(0, n);

}

如何隐藏特定活动的通知？

3 个答案: